Anatomy

Question 1

What is the Glabella? What tx is it important in? What happens to it in flexion?

Answer 1

Area of the frontal bone just above the nasion.
Tx = Vomer Rocking.
Flexion = Flattens.

Question 2

What are the 7 bones that make up the orbit?

Answer 2

Frontal, Lacrimal, Ethmoid, Zygomatic, Maxillary, Palatine, Sphenoid

Question 3

What bones make up the Pterion? What is their relationship (deep to superficial)? Why is the relationship important?

Answer 3

Junction of the frontal, parietal, sphenoid and temporal bones.
Alphabetical from deep to superficial (Frontal (deepest), P, S, Temporal (superficial)).
*Always do Frontal Lift first!

Question 4

What bones make up the Asterion? What is their relationship (deep to superficial)?

Answer 4

Junction of the occiput, parietal, and mastoid portion of the Temporal bone.
“pot” or “top” = Temporal becomes MOST deep

Question 5

What are 2 ligaments important in the TMJ?

Answer 5

Sphenomandibular Ligament and Stylomandibular Ligament

Question 6

What is the Inion (external occipital protuberance)? What important structure does it coincide with?

Answer 6

Midpoint of the superior nuchal line of the occiput.

Confluence of sinuses.

Question 7

What is the Superior Nuchal Line? What important structure does it coincide with?

Answer 7

Ridge extending laterally from the external occipital protuberance toward the lateral angle of the occipital bone.
Transverse sinus.

Question 8

What is Bregma? What is Lambda? Which is in front/back?

Answer 8

Bregma (Front): At the junction of the coronal and sagittal sutures.
Lambda (Back): Junction of the sagittal and lambdoidal sutures.

Question 9

What is the Cruciate suture? What tx is it important in?

Answer 9

Formed by the juncture of the intermaxillary, interpalatine and palatomaxillary sutures.
Tx = Vomer rocking.

Question 10

What is the Sphenobasilar synchondrosis? It’s apparently super duper important.

Answer 10

Articulation of the basilar part of the sphenoid body with the basilar part of the occiput.

Question 11

What is Basion? What is Opisthion? Which is in front/back?

Answer 11

Basion (Front): Midpoint of the anterior border of the foramen magnum.
Opisthion (Back): Midpoint of the posterior border of the foramen magnum.

Question 12

What is the Styloid process? What is it important in?

Answer 12

A slender, pointed process projecting inferiorly from the undersurface of the temporal bone. Gives attachment to the stylohyoid and stylomandibular ligaments.
Important in TMJ.

Question 13

What is Crista galli of the ethmoid bone? What attaches here?

Answer 13

Crestlike elevation on the upper median surface of the cribriform plate. Point of anterior attachment of the falx cerebri.

Question 14

What is the Cribriform plate? Damage to this structure can cause what?

Answer 14

Articulates with the ethmoidal notch of the frontal bone. Forms part of the roof of the nasal canal.
Damage = anosmia

Question 15

What are the Anterior and posterior clinoid processes? What attaches here?

Answer 15

Projections on the body of the sphenoid which give attachment to the tentorium cerebelli.

Question 16

What is the Sella Turcica? What important structure lives here?

Answer 16

A hollow area on the dorsal surface of the sphenoid body which contains the pituitary gland.

Question 17

What is the Internal occipital protuberance? What external structure does it correlate to? What important structure does it coincide with?

Answer 17

A small bony prominence on the internal surface of the skull, directly opposite from the external occipital protuberance.
Confluence of sinuses.

Question 18

What is the confluence of sinuses?

Answer 18

A meeting place, at the internal occipital protuberance, of the superior sagittal, straight, occipital, drained by the two transverse sinuses of the dura mater.

Question 19

What is the Sigmoid sinus groove?

Answer 19

A broad groove on the lateral portion of the occipital bone that lodges the sigmoid sinus.

Question 20

What is the Petrous ridge of the temporal bones? What attaches here? What else is important about this structure?

Answer 20

Sharp bony angulation along the petrous portion of the temporal bone, separating the middle and posterior cranial fossae.
Tentorium cerebelli attaches here.
Axis of rotation of temporal bone.